Electricity storage device and electric equipment

Abstract

The utility model provides an electricity storage device and electric equipment. The electricity storage device comprises a shell body, an upper cover, a cover plate, a battery module and a BMS assembly. The shell body comprises a bottom wall and a side wall, the side wall and the inner wall surface of the bottom wall jointly define a containing space, the side wall and the bottom wall are of an integrated structure, and a heat dissipation channel is formed in the outer wall surface of the side wall and / or the bottom wall; at least part of the cover plate covers the outer wall surface of the side wall and / or the bottom wall and seals the heat dissipation channel; a heat insulation part is arranged in the accommodating space, and the accommodating space is at least divided into a first accommodating bin and a second accommodating bin by the heat insulation part; the shell body is provided with a cooling medium inlet and a cooling medium outlet, and the cooling medium inlet and the cooling medium outlet are respectively communicated with the heat dissipation channel; the second containing bin is arranged on the side, close to the cooling medium inlet, of the first containing bin, the battery module is located in the first containing bin, and the BMS assembly is located in the second containing bin, so that the structural strength of the shell of the electricity storage device and the heat dissipation efficiency of the electricity storage device are improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to an energy storage device and an electrical appliance. Background Technology

[0002] Battery packs, as energy storage devices, are widely used in electric vehicles, electric bicycles, drones, and other electric equipment. A battery pack specifically includes a housing, battery modules, and a Battery Management System (BMS). The battery modules and BMS are housed within the housing. The battery modules consist of multiple battery cells, and the BMS is responsible for monitoring and managing the battery's status to ensure its safe and efficient operation.

[0003] However, the structural strength of the battery pack casing in the relevant technologies cannot meet the requirements, and the heat dissipation of the battery pack is poor, which affects the safety of the battery pack and its cycle life. Utility Model Content

[0004] In view of this, the present invention aims to provide an energy storage device and an electrical device to improve the casing strength and heat dissipation efficiency of the energy storage device.

[0005] In a first aspect, this utility model provides an energy storage device, including a shell body, a top cover, a cover plate, a battery module, and a BMS component;

[0006] The shell body includes a bottom wall and a side wall arranged circumferentially along the bottom wall. The side wall and the inner wall surface of the bottom wall together form an accommodating space. The top cover is placed on the shell body and seals the accommodating space.

[0007] The sidewall and the bottom wall are an integral structure, and a heat dissipation channel is formed on the outer wall surface of the sidewall and / or the bottom wall; at least part of the cover plate is provided on the outer wall surface of the sidewall and / or the bottom wall and seals the heat dissipation channel;

[0008] The accommodating space is provided with a heat insulation component, which divides the accommodating space into at least a first accommodating compartment and a second accommodating compartment.

[0009] The shell body is provided with a cooling medium inlet and a cooling medium outlet, which are respectively connected to the heat dissipation channel; the second accommodating compartment is located on the side of the first accommodating compartment near the cooling medium inlet;

[0010] The battery module is located in the first compartment, the BMS component is located in the second compartment, and the battery module is electrically connected to the BMS component.

[0011] Optionally, a first heat-conducting element is provided on the inner wall of the second accommodating compartment at least at a position corresponding to the heat dissipation channel, and the first heat-conducting element is thermally coupled to the BMS component.

[0012] Optionally, the first thermally conductive component is a thermally conductive structural adhesive.

[0013] Optionally, the cooling medium inlet is disposed on the wall of the second receiving chamber, and the inner wall of the second receiving chamber protrudes towards the interior of the second receiving chamber to form a first buffer cavity, the first buffer cavity being connected to the cooling medium inlet and the heat dissipation channel respectively;

[0014] And / or, the cooling medium outlet is disposed on the wall of the second receiving chamber, and the inner wall of the second receiving chamber protrudes toward the interior of the second receiving chamber to form a second buffer cavity, the second buffer cavity being connected to the heat dissipation channel and the cooling medium outlet respectively.

[0015] Optionally, at least a portion of the heat dissipation channels are disposed on the outer wall surface of the bottom wall;

[0016] The cooling medium inlet and the cooling medium outlet are located on the side wall.

[0017] Optionally, the cooling medium inlet and the cooling medium outlet are located on the same side of the shell body;

[0018] In the width direction along the sidewall where the cooling medium inlet and the cooling medium outlet are located, the distance between the cooling medium inlet and the cooling medium outlet is not less than 1 / 3 of the width of the sidewall.

[0019] Optionally, the heat dissipation channel is bent and disposed on the outer wall surface of the side wall and / or the bottom wall;

[0020] And / or, at least a portion of the heat dissipation channels are provided to extend along the arrangement direction of the second and first receiving compartments.

[0021] Optionally, the heat insulation component includes two opposing plates, with a heat insulation cavity formed between the two plates;

[0022] At least one connecting plate is connected between the two plates, and the connecting plate divides the heat insulation cavity into at least two sub-cavities.

[0023] And / or, there are at least two heat insulation components, one of which is located between the battery module and the BMS assembly, and the other of which is located at the end of the battery module away from the second receiving compartment;

[0024] And / or, the heat insulation element, the sidewall, and the bottom wall are an integral structure.

[0025] Optionally, the second receiving compartment has a mounting rack;

[0026] The BMS component is mounted on the mounting bracket and is thermally coupled to the mounting bracket; the mounting bracket is thermally coupled to the side wall and / or the bottom wall provided with the heat dissipation channel.

[0027] Optionally, a first heat-conducting element is provided between the mounting bracket and the side wall and / or bottom wall where the heat dissipation channel is provided;

[0028] And / or, a second heat-conducting element is provided between the BMS component and the mounting bracket;

[0029] And / or, the mounting bracket has a flange that overlaps the insulation and is connected to the insulation;

[0030] And / or, the BMS component includes a BMS control board and an output base assembly connected to the BMS control board, the BMS control board being connected to and thermally coupled to the mounting bracket, the mounting bracket having a support step, and the output base assembly being located on the support step;

[0031] And / or, the mounting bracket is an aluminum mounting bracket.

[0032] Optionally, the mounting frame includes a main body plate and a side panel connected to one side of the main body plate, the main body plate and the side panel forming an accommodating space, and the BMS component is located within the accommodating space;

[0033] The BMS component is mounted on the main body plate and is thermally coupled to the main body plate. At least a portion of the side panels are thermally coupled to the bottom wall and / or side wall provided with the heat dissipation channel.

[0034] Optionally, a third heat-conducting component is provided on the inner wall of the first receiving compartment at least at a position corresponding to the heat dissipation channel, and the third heat-conducting component is thermally coupled to the battery module;

[0035] And / or, the shell body is an aluminum shell.

[0036] Optionally, there are at least two battery modules;

[0037] And / or, the battery module includes at least two cells, each cell having tabs;

[0038] The tabs of two adjacent battery cells are bent and extended toward each other, with one of the battery cells' tabs overlapping and welded together with the tab of the other battery cell's tab.

[0039] And / or, the battery module has a first electrode terminal and a second electrode terminal, the first electrode terminal and the second electrode terminal have opposite polarities, and the first electrode terminal and the second electrode terminal are electrically connected to the BMS component through conductive connection blocks; at least one side of the conductive connection block facing the battery module is provided with an insulating structure;

[0040] The insulation structure includes a heat-shrinkable insulating sleeve fitted onto the conductive connector.

[0041] Secondly, this embodiment provides an electrical device, including the energy storage device described above.

[0042] The energy storage device and electrical equipment provided by this utility model improve the structural strength of the shell body by making the shell body of the energy storage device include side walls and bottom walls, with the inner surfaces of the side walls and bottom walls together forming an accommodating space. This makes the side walls and bottom walls an integral structure, that is, the side walls and bottom walls are integrally formed, thereby improving the structural strength of the shell body and the overall shell of the energy storage device. It can effectively resist damage caused by the kinetic energy and inertia of the energy storage device during impact, making the shell particularly suitable for energy storage devices with a large number of battery cells. Moreover, since the side walls and bottom walls are integrally formed, the number of molds required for the production of the shell body is reduced, which improves the convenience of production and reduces the production cost to a certain extent.

[0043] Because heat dissipation channels are formed simultaneously on the outer surfaces of the sidewalls and / or bottom walls during the integral molding of the sidewalls and bottom walls, and cooling medium inlets and outlets connected to the heat dissipation channels are provided on the shell body, cooling medium is injected into the heat dissipation channels through the cooling medium inlets, and the cooling medium dissipates heat and cools the battery modules and BMS components inside the shell body, avoiding excessive temperature rise of the battery modules and BMS components that could lead to thermal runaway of the energy storage device.

[0044] Furthermore, by installing heat insulation components within the housing space, the inner cavity of the casing body is divided into a first housing compartment and a second housing compartment. The battery module and BMS component are installed in different housing compartments, thereby avoiding thermal interference between the battery module and the BMS component to a certain extent. For example, if the battery module experiences unexpected thermal runaway, the BMS component has sufficient feedback time to output a feedback signal, preventing the energy storage device from catching fire, thus improving the safety of use.

[0045] Meanwhile, since the energy stored in the energy storage device is ultimately collected in the BMS module, by placing the second housing compartment for installing the BMS module on the side of the first housing compartment for installing the battery module closer to the cooling medium inlet, the BMS module is placed closer to the cooling medium inlet relative to the battery module. This improves the heat dissipation efficiency of the BMS module, further reduces the temperature rise of the BMS module, and effectively prevents the heat from the BMS module from being transferred to the battery module. This improves the overall heat dissipation efficiency of the energy storage device, and enhances the safety and cycle life of the energy storage device. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the housing of the energy storage device according to an embodiment of the present invention;

[0047] Figure 2 for Figure 1 Corresponding exploded structure diagram;

[0048] Figure 3 This is a schematic diagram of the structure of the shell body of the energy storage device according to an embodiment of the present invention;

[0049] Figure 4 This is a schematic diagram of the casing of the energy storage device according to an embodiment of the present invention from another perspective;

[0050] Figure 5 This is a top view of the housing of the energy storage device according to an embodiment of the present invention;

[0051] Figure 6 This is a schematic diagram of the structure of the energy storage device, including the housing, battery module, and BMS module, when installed together according to an embodiment of the present invention.

[0052] Figure 7 This is a schematic diagram of the structure of the energy storage device according to an embodiment of the present invention, in which an installation frame is provided in the second receiving compartment;

[0053] Figure 8 for Figure 7 Corresponding exploded structure diagram;

[0054] Figure 9 This is an exploded structural diagram of the housing, mounting frame, and BMS component of the energy storage device according to an embodiment of the present invention.

[0055] Figure 10 This is a schematic diagram of the structure of the housing and insulating connection seat of the energy storage device according to an embodiment of the present invention.

[0056] Among them, 100, shell; 1, shell body; 10, heat dissipation channel; 11, bottom wall; 12, side wall; 13, first receiving compartment; 131, third heat conduction component; 14, second receiving compartment; 141, first buffer cavity; 142, second buffer cavity; 15, cooling medium inlet; 16, cooling medium outlet; 17, exhaust port; 18, slot; 2, cover plate; 3, heat insulation component; 30, heat insulation cavity; 31, plate; 32, connecting plate; 4, first heat conduction component; 5, mounting bracket; 51. Main body plate; 52. Side panel; 53. Flanged edge; 54. Supporting step; 6. Second heat-conducting component; 7. Battery module; 71. Battery cell; 711. Electrode tab; 72. First electrode terminal; 73. Second electrode terminal; 74. Conductive connector; 741. Insulation structure; 8. BMS assembly; 81. BMS control board; 82. Output base assembly; 821. First output terminal; 822. Second output terminal; 823. Conductive connector; 9. Insulating connector. Detailed Implementation

[0057] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0058] Energy storage devices, such as battery packs, specifically include: a housing, battery modules, and a battery management system (BMS, hereinafter referred to as the BMS assembly). The battery modules and the BMS assembly are located inside the housing.

[0059] A battery module consists of multiple cells. The battery management system is responsible for monitoring and managing the battery's status, such as current, voltage, and temperature, to ensure the battery's safe and efficient operation.

[0060] The shell structure of the energy storage device in the relevant technology cannot meet the requirements, which makes the energy storage device unable to withstand large impacts and other damage. In addition, the heat dissipation of the energy storage device is poor, which can easily lead to thermal runaway and other situations, affecting the safety and cycle life of the energy storage device.

[0061] Based on this, the present invention provides an energy storage device and an electrical device. By making the bottom wall and side wall of the shell body of the energy storage device an integral die-cast structure, the structural strength of the shell body is improved, thereby enhancing the energy storage device's impact resistance. Simultaneously, while integrally forming the shell body, heat dissipation channels are formed on the outer surface of the side wall and / or bottom wall, and a cooling medium inlet and a cooling medium outlet are provided on the shell body. Cooling medium is introduced into the heat dissipation channels through the cooling medium inlet to achieve effective heat dissipation for the battery module, BMS component, etc., inside the energy storage device. At the same time, a heat insulation component is provided inside the shell body, which divides the inner cavity of the shell body into a first receiving compartment and a second receiving compartment, so that the battery module and BMS component are located in different receiving compartments, and the receiving compartment of the BMS component is closer to the cooling medium inlet than the receiving compartment of the battery module, thereby avoiding thermal interference between the battery module and the BMS component, improving the heat dissipation efficiency of the BMS component, and thus improving the overall heat dissipation efficiency of the energy storage device.

[0062] The energy storage device and electrical equipment provided by this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments:

[0063] Reference Figures 1 to 10 As shown, this embodiment provides an energy storage device, which may be, for example, a battery pack.

[0064] The energy storage device includes: a housing 100, a top cover (not shown in the figure), a battery module 7, and a BMS component 8. The battery module 7 is electrically connected to the BMS component 8, which is responsible for monitoring and managing the status of the battery module 7, such as current, voltage, and temperature, to ensure the safe and efficient operation of the energy storage device.

[0065] The shell 100 specifically includes a shell body 1 and a cover plate 2. The shell body 1 includes a bottom wall 11 and side walls 12 arranged circumferentially along the bottom wall 11. The side walls 12 and the inner wall surface of the bottom wall 11 together form an accommodating space. The cover plate is placed on the shell body 1 and seals the accommodating space.

[0066] For example, the top of the housing 100 has an opening communicating with the receiving space, and the top cover is placed on the opening and seals the receiving space, for example, by connecting it to the housing body 1 with screws or bolts. In addition, for example, a glue groove can be provided at the edge of the opening of the housing body 1, and by filling the glue groove with glue, the sealing performance between the top cover and the housing body 1 can be improved.

[0067] The side wall 12 and the bottom wall 11 are integral structures, and heat dissipation channels 10 are formed on the outer wall surfaces of the side wall 12 and / or the bottom wall 11.

[0068] In other words, the sidewall 12 and the bottom wall 11 are integrally formed, and a heat dissipation channel 10 is integrally formed on the outer wall surface of the sidewall 12 and / or the bottom wall 11 during the forming process. By integrally forming the sidewall 12 and the bottom wall 11, the structural strength of the shell body 1 is improved, thereby improving the structural strength of the entire energy storage device shell 100, enhancing the energy storage device's resistance to impact, and reducing the number of molds required for manufacturing the shell body 1, thus improving manufacturing convenience and reducing manufacturing costs.

[0069] The heat dissipation channel 10 can be formed on the outer wall surface of the bottom wall 11 or on the outer wall surface of the side wall 12, or a portion of the heat dissipation channel 10 can be located on the outer wall surface of the side wall 12 and a portion of the heat dissipation channel 10 can be located on the outer wall surface of the bottom wall 11.

[0070] The shell body 1 is provided with a cooling medium inlet 15 and a cooling medium outlet 16, which are respectively connected to the heat dissipation channel 10. At least part of the cover plate 2 is covered on the outer wall surface of the side wall 12 and / or the bottom wall 11 and seals the heat dissipation channel 10 to avoid cooling medium leakage and other situations, and further improves the structural strength of the entire shell 100.

[0071] For example, the heat dissipation channel 10 is located on the outer wall surface of the bottom wall 11, and the cover plate 2 can be connected to the bottom wall 11 by means of welding, for example, by sealing welding between the cover plate 2 and the outer periphery of the bottom wall 11.

[0072] Cooling medium is introduced into the heat dissipation channel 10 through the cooling medium inlet 15. The cooling medium dissipates heat from the battery module 7, BMS component 8, etc. in the energy storage device, preventing the battery module 7 and BMS from overheating and causing thermal runaway in the energy storage device.

[0073] The space is equipped with a heat insulation component 3, which divides the space into at least a first compartment 13 and a second compartment 14. The battery module 7 is located in the first compartment 13, and the BMS component 8 is located in the second compartment 14.

[0074] The battery module 7 and the BMS component 8 are separated by the heat insulation component 3, which to a certain extent avoids thermal interference between the battery module 7 and the BMS component 8. For example, if the battery module 7 experiences unexpected thermal runaway, the BMS component 8 will have enough time to output a feedback signal, thus preventing the energy storage device from catching fire.

[0075] When the energy storage device is in use, the electricity it generates is ultimately collected in the BMS module, resulting in a high temperature rise rate for the BMS module. Especially under heavy load output from the energy storage device, the temperature of the BMS module may be significantly higher than that of the battery module. If the heat dissipation efficiency of the BMS module is low, it will not only affect the normal operation of the BMS module, but also cause the adjacent battery to be subjected to more heat, thus leading to safety hazards and reduced cycle life of the energy storage device. Based on this, while using the heat insulation component 3 to separate the battery module 7 and the BMS module 8 into different housings to reduce the heat impact between them, the second housing 14 is also located on the side of the first housing 13 near the cooling medium inlet 15.

[0076] In other words, the BMS component 8 is positioned closer to the cooling medium inlet 15 relative to the battery module 7, so that the cooling medium entering through the cooling medium inlet 15 can preferentially exchange heat with the BMS component 8. This effectively avoids thermal interference between the BMS component 8 and the battery module 7 while improving the heat exchange efficiency of the BMS component 8.

[0077] It should be noted that, in specific implementations, the cooling medium can be a cooling liquid, i.e., heat dissipation of the energy storage device is achieved through liquid cooling. For example, the main components of the cooling liquid may include water, alcohols, and chemical additives. Alternatively, the cooling medium can also be a cooling gas, i.e., heat dissipation of the energy storage device is achieved through gas cooling. For example, the cooling gas may be an inert gas such as argon or helium.

[0078] For example, the sidewall 12 and the bottom wall 11 can be made of metal and are integrally formed by die casting. For instance, the sidewall 12 and the bottom wall 11 can be made of aluminum and integrally die-cast to form an aluminum shell body. Of course, the sidewall 12 and the bottom wall 11 can also be made of other metals such as copper.

[0079] By integrally die-casting the sidewalls 12 and bottom wall 11, the structural strength of the shell body 1 is further improved, thereby further enhancing the impact resistance of the entire shell 100 of the energy storage device and effectively protecting the battery module and other components inside the shell 100. Moreover, the die-cast shell body 1 itself can play a certain role in heat dissipation, allowing the heat inside the shell to be dissipated through the shell body 1, thereby improving the heat dissipation efficiency of the energy storage device.

[0080] In addition, in other implementations, the sidewall 12 and the bottom wall 11 can also be integrally formed by injection molding or other methods.

[0081] The energy storage device provided in this embodiment includes a side wall 12 and a bottom wall 11 in its shell body 1. The inner surfaces of the side wall 12 and the bottom wall 11 together form an accommodating space, making the side wall 12 and the bottom wall 11 an integral structure. That is, the side wall 12 and the bottom wall 11 are integrally formed, thereby improving the structural strength of the shell body 1 and thus improving the structural strength of the entire shell of the energy storage device. It can effectively resist the damage caused by the kinetic energy and inertia of the energy storage device during impact, making the shell 100 particularly suitable for energy storage devices with a large number of battery cells 71. Moreover, since the side wall 12 and the bottom wall 11 are integrally formed, the number of molds required for manufacturing the shell body 1 is reduced, which improves the convenience of manufacturing to a certain extent and reduces the manufacturing cost.

[0082] Since heat dissipation channels 10 are formed simultaneously on the outer wall surfaces of the side wall 12 and / or the bottom wall 11 when the side wall 12 and the bottom wall 11 are integrally formed, and a cooling medium inlet 15 and a cooling medium outlet 16 communicating with the heat dissipation channels 10 are provided on the shell body 1, cooling medium is injected into the heat dissipation channels 10 through the cooling medium inlet 15, and the cooling medium dissipates heat and cools the battery module 7 and BMS component 8 inside the shell 100, so as to avoid the battery module 7 and BMS component 8 from overheating and causing thermal runaway of the energy storage device.

[0083] Furthermore, by setting a heat insulation component 3 within the containment space, the heat insulation component 3 divides the inner cavity of the shell body 1 into a first containment compartment 13 and a second containment compartment 14, and the battery module 7 and BMS component 8 are installed in different containment compartments. This avoids thermal interference between the battery module 7 and BMS component 8 to a certain extent. For example, if the battery module 7 experiences accidental thermal runaway, the BMS component 8 has sufficient feedback time to output a feedback signal, preventing the energy storage device from catching fire, thereby improving the safety of use.

[0084] Meanwhile, since the energy stored in the energy storage device is ultimately collected in the BMS module 8, by placing the second receiving compartment 14 for installing the BMS module 8 on the side of the first receiving compartment 13 for installing the battery module 7 closer to the cooling medium inlet 15, that is, by placing the BMS module 8 closer to the cooling medium inlet 15 relative to the battery module 7, the heat dissipation efficiency of the BMS module 8 is improved, the temperature rise of the BMS module 8 is further reduced, and the heat of the BMS module 8 can be effectively prevented from being transferred to the battery module 7, thereby improving the heat dissipation efficiency of the entire energy storage device and improving the safety and cycle life of the energy storage device.

[0085] Reference Figures 1 to 3 As shown, in a specific implementation, the shell body 1 is also provided with an exhaust port 17, so that the high temperature gas generated when the battery module 7 is working can be discharged from the exhaust port 17 in a timely manner, thereby avoiding the occurrence of safety hazards due to high gas pressure inside the shell 100 of the energy storage device.

[0086] Reference Figure 5 As shown, in some embodiments, a first heat-conducting element 4 is provided on the inner wall of the second receiving compartment 14 at least at the position corresponding to the heat dissipation channel 10, and the first heat-conducting element 4 is thermally coupled to the BMS component 8.

[0087] By setting the first heat-conducting element 4, the heat of the BMS component 8 can be transferred out in a timely and effective manner, thereby further improving the heat exchange efficiency of the BMS component 8.

[0088] It should be noted that the thermal coupling here can be, for example, direct contact between the BMS component 8 and the first heat-conducting element 4, so that the heat of the BMS component 8 can be directly transferred to the first heat-conducting element 4, and then transferred through the first heat-conducting element 4 to the bottom wall 11 and / or side wall 12 with the heat dissipation channel 10, thereby achieving heat dissipation of the BMS component 8. Alternatively, there can be indirect contact between the BMS component 8 and the first heat-conducting element 4, as long as the heat of the BMS component 8 can be effectively and promptly conducted to the first heat-conducting element 4.

[0089] In some embodiments, the first thermally conductive element 4 can be a thermally conductive structural adhesive. This arrangement not only achieves thermal conductivity but also allows the BMS component 8 to be fixed within the second receiving chamber 14 via the first thermally conductive element 4. While achieving heat dissipation, it also provides a fixing effect on the BMS component 8, improving the stability of the BMS component 8.

[0090] Of course, in other implementations, the first heat-conducting component 4 can also be heat-conducting foam, etc.

[0091] Combination Figure 3 and Figure 5 As shown, in some embodiments, at least a portion of the heat dissipation channel 10 is disposed on the outer wall surface of the bottom wall 11.

[0092] This makes it easier to set up the heat dissipation channel 10 and helps to increase the heat exchange area of ​​the battery module 7 and BMS component 8, thereby improving the heat dissipation efficiency of the battery module 7 and BMS component 8.

[0093] For example, the first heat-conducting element 4 can be disposed on the inner bottom wall of the second receiving chamber 14, and the BMS component 8 can exchange heat with the bottom wall 11 provided with the heat dissipation channel 10 through the first heat-conducting element 4 to achieve heat dissipation of the BMS component 8.

[0094] Continue to refer to Figure 3 and Figure 5 As shown, in some embodiments, the cooling medium inlet 15 and the cooling medium outlet 16 are located on the side wall 12. This not only facilitates manufacturing but also allows for the inflow and outflow of the cooling medium and makes it easier to connect to a cooling medium supply device.

[0095] Combination Figure 4and Figure 5 As shown, in some embodiments, the cooling medium inlet 15 is located on the wall of the second receiving chamber 14. This allows the cooling medium entering through the cooling medium inlet 15 to preferentially exchange heat with the BMS component 8 within the second receiving chamber 14, further improving the heat exchange efficiency of the BMS component 8.

[0096] The inner wall of the second receiving chamber 14 protrudes inward to form a first buffer cavity 141, which is connected to both the cooling medium inlet 15 and the heat dissipation channel 10. In other words, the cooling medium entering through the cooling medium inlet 15 first enters the first buffer cavity 141, and then from the first buffer cavity 141 into the heat dissipation channel 10. This allows the first buffer cavity 141 to temporarily store the cooling medium, ensuring a continuous supply of cooling medium within the heat dissipation channel 10 and thus guaranteeing heat dissipation efficiency. Furthermore, the presence of the first buffer cavity 141 increases the heat exchange area between the cooling medium and the BMS component 8, further improving heat exchange efficiency.

[0097] In some embodiments, the cooling medium outlet 16 is disposed on the wall of the second receiving chamber 14, and the inner wall of the second receiving chamber 14 protrudes toward the interior of the second receiving chamber 14 to form a second buffer cavity 142, which is connected to the heat dissipation channel 10 and the cooling medium outlet 16 respectively.

[0098] This design ensures smooth discharge of the cooling medium, further guaranteeing its rapid and continuous flow throughout the heat dissipation channel, thereby improving heat exchange efficiency.

[0099] Reference Figure 2 and Figure 3 As shown, the heat dissipation channel 10 is curved and disposed on the outer wall surface of the bottom wall 11. For example, the heat dissipation channel 10 may be approximately U-shaped or S-shaped.

[0100] This makes the heat dissipation channel 10 longer while keeping the total area of ​​the bottom wall 11 unchanged, thereby further increasing the heat exchange area and improving the heat dissipation efficiency.

[0101] Of course, in other implementations, the heat dissipation channel 10 can also be bent and set on the outer wall surface of the side wall 12.

[0102] In some embodiments, at least a portion of the heat dissipation channel 10 extends along the arrangement direction of the second receiving chamber 14 and the first receiving chamber 13.

[0103] This further increases the heat exchange area between the heat dissipation channel 10 and the first and second receiving chambers 13 and 14, thereby further improving the heat dissipation efficiency of the battery module 7 and the BMS component 8.

[0104] Reference Figures 1 to 3 As shown, the cooling medium inlet 15 and the cooling medium outlet 16 are located on the same side of the shell body 1.

[0105] This arrangement facilitates the connection between the cooling medium inlet 15 and the cooling medium outlet 16 and the cooling medium supply container, making it easier to circulate the cooling medium.

[0106] Furthermore, referring to Figure 3 As shown, in the width direction along the side wall 12 where the cooling medium inlet 15 and the cooling medium outlet 16 are located, the distance d between the cooling medium inlet 15 and the cooling medium outlet 16 is not less than 1 / 3 of the width D of the side wall 12.

[0107] This arrangement ensures that the distance between the cooling medium inlet 15 and the cooling medium outlet 16 is not too small, thus preventing the high-temperature cooling medium discharged from the cooling medium outlet 16 from causing a thermal impact on the lower-temperature cooling medium entering from the cooling medium inlet 15. This further ensures that the cooling medium entering from the cooling medium inlet 15 has a lower temperature, thereby ensuring the heat dissipation effect on the energy storage device.

[0108] In some embodiments, the heat insulation element 3 can be integrated with the side wall 12 and the bottom wall 11.

[0109] This design further enhances the overall structural strength of the shell body 1, thereby increasing the structural strength of the energy storage device shell 100 and further improving the energy storage device's impact resistance. Furthermore, it reduces the number of molds required for manufacturing, simplifies the manufacturing process, and lowers production costs.

[0110] For example, the heat insulation element 3, the side wall 12 and the bottom wall 11 are integrally die-cast, which further improves the structural strength of the entire shell body 1.

[0111] Combination Figure 4 and Figure 5 As shown, in some embodiments, the heat insulation member 3 includes two oppositely arranged plates 31, with a heat insulation cavity 30 formed between the two plates 31.

[0112] This design not only improves the structural strength of the heat insulation component 3, but also the presence of the heat insulation cavity 30 can further improve the heat insulation effect of the heat insulation component 3, thereby further avoiding the occurrence of thermal interference between the battery module 7 and the BMS component 8.

[0113] Furthermore, at least one connecting plate 32 is connected between the two plates 31, and the connecting plate 32 divides the heat insulation cavity 30 into at least two sub-cavities.

[0114] This design further enhances the structural strength and insulation effect of the entire insulation component 3.

[0115] Combination Figures 4 to 6 As shown, there are at least two heat insulation components 3, one of which is located between the battery module 7 and the BMS component 8, and the other is located in the first receiving compartment 13 and at the end of the battery module 7 away from the second receiving compartment 14.

[0116] This allows two of the heat insulation components 3 to form end plates at both ends of the battery module 7, eliminating the need for additional end plates for the battery module 7, thus saving costs and internal space of the housing 100.

[0117] Reference Figures 7 to 9 As shown, in some embodiments, the second receiving compartment 14 has a mounting frame 5, the BMS component 8 is mounted on the mounting frame 5 and is thermally coupled to the mounting frame 5; the mounting frame 5 is thermally coupled to the side wall 12 and / or bottom wall 11 provided with heat dissipation channels 10.

[0118] As mentioned above, thermal coupling in this article can be direct contact heat transfer or indirect contact heat transfer; for example, heat transfer through air, liquid, or thermally conductive media such as thermally conductive structural adhesive, without further limitation.

[0119] The installation of BMS component 8 is achieved through mounting bracket 5, which improves the ease of installation of BMS component 8.

[0120] In practice, the heat emitted by the BMS component 8 is transferred to the mounting bracket 5, and then transferred through the mounting bracket 5 to the side wall 12 and / or bottom wall 11 with the heat dissipation channel 10, thereby achieving heat exchange and heat dissipation of the BMS component 8.

[0121] Specifically, the first heat-conducting element 4 can be located between the mounting bracket 5 and the side wall 12 and / or bottom wall 11 where the heat dissipation channel 10 is provided.

[0122] When the first heat-conducting component 4 is a heat-conducting structural adhesive, it not only realizes the heat transfer between the mounting bracket 5 and the shell body 1, that is, the heat transfer between the BMS component 8 and the shell body 1, but also realizes the fixing function of the mounting bracket 5.

[0123] In some embodiments, the mounting bracket 5 has a flange 53 that overlaps with and is connected to the heat insulation member 3.

[0124] This design further improves the stability of the mounting bracket 5 and facilitates the connection between the mounting bracket 5 and the heat insulation component 3.

[0125] For example, corresponding mounting holes can be provided on the flange 53 and the heat insulation component 3. The flange 53 and the heat insulation component 3 can be connected by screws or the like passing through the corresponding mounting holes, thereby fixing the mounting frame 5 to the second receiving compartment 14, improving the stability of the mounting frame 5, and thus improving the stability of the BMS component 8 installed on the mounting frame 5.

[0126] Reference Figure 9 As shown, in some embodiments, a second heat-conducting element 6 is provided between the BMS component 8 and the mounting bracket 5.

[0127] For example, the second thermally conductive element 6 can be thermally conductive foam. Of course, the second thermally conductive element 6 can also be thermally conductive adhesive, etc.

[0128] Specifically, the heat from the BMS component 8 is transferred to the mounting bracket 5 through the second heat-conducting element 6, and then to the housing body 1 through the mounting bracket 5. By setting the second heat-conducting element 6, the heat transfer efficiency of the BMS component 8 is improved.

[0129] Continue to refer to Figure 9 As shown, the BMS component 8 specifically includes a BMS control board 81 and an output base assembly 82. The BMS control board 81 is connected to and thermally coupled to the mounting bracket 5. The mounting bracket 5 has a support step 54, and the output base assembly 82 is located on the support step 54.

[0130] This setup effectively utilizes the structure of the mounting bracket 5, enabling the installation and heat exchange of the BMS control board 81 while simultaneously supporting and positioning the output base assembly 82, thus improving the stability and ease of assembly of the entire BMS component 8.

[0131] In practice, the mounting bracket 5 can be made of aluminum. This can improve the heat transfer rate of the mounting bracket 5, thereby improving the heat transfer efficiency between the BMS component 8 and the housing 1.

[0132] Of course, in other implementations, the mounting bracket 5 can also be made of copper or other metals with good thermal conductivity, or it can be made of non-metallic materials with good thermal conductivity.

[0133] Continue to combine Figure 8 and Figure 9 As shown, the mounting bracket 5 specifically includes a main body plate 51 and a side panel 52 connected to one side of the main body plate 51. The main body plate 51 and the side panel 52 form an accommodating space, within which the BMS component 8 is located.

[0134] The BMS component 8 is mounted on the main body plate 51 and is thermally coupled to the main body plate 51. At least part of the side panel 52 is thermally coupled to the bottom wall 11 and / or side wall 12 provided with heat dissipation channels 10.

[0135] This design allows the mounting bracket 5 to provide some protection for the BMS component 8. For example, if the housing 100 of the energy storage device is accidentally squeezed, the presence of the mounting bracket 5 can provide some cushioning against the squeeze, thus reducing the likelihood of damage to the BMS component 8.

[0136] For example, if the heat dissipation channel 10 is located on the bottom wall 11, a first heat-conducting element 4 can be provided between the side panel 52 located at the bottom and the bottom wall 11 to achieve heat exchange between the mounting bracket 5 and the bottom wall 11. The side panels 52 located on both sides can protect the BMS component 8 at least from the width direction of the energy storage device, preventing damage to the BMS component 8 when the housing 100 of the energy storage device is accidentally squeezed.

[0137] Specifically, the top of the side panels 52 on both sides is at a lower height than the top of the main body plate 51, thereby defining the aforementioned support steps 54 between the top of the side panels 52 on both sides and the main body plate 51, effectively utilizing the structure of the mounting bracket 5 to achieve effective and stable support for the output base assembly 82.

[0138] In some embodiments, a third heat-conducting element 131 is provided at the position of the heat dissipation channel 10 on the inner wall of the first receiving compartment 13, and the third heat-conducting element is thermally coupled to the battery module 7.

[0139] For example, when the heat dissipation channel 10 is set on the bottom wall 11, the third heat conduction element 131 is set on the inner bottom wall 11 of the first receiving chamber 13.

[0140] By setting a third heat-conducting component 131 between the battery module 7 and the shell body 1, the heat emitted by the battery module 7 can be transferred to the shell body 1 in a timely and rapid manner, thereby achieving heat exchange with the cooling medium and further improving the heat dissipation efficiency of the battery module 7.

[0141] For example, the third thermal conductive component 131 can be a thermally conductive structural adhesive, which can not only conduct heat but also fix the battery module 7.

[0142] Of course, the third heat-conducting component 131 can also be a colloid with only thermal conductivity, or the third heat-conducting component 131 can be thermally conductive foam.

[0143] In some embodiments, there are at least two battery modules 7. Each battery module 7 may include at least two battery cells 71.

[0144] For example, multiple battery cells 71 in each battery module 7 are stacked sequentially along the length of the casing body 1, and at least two battery modules 7 are arranged sequentially along the width of the casing body 1.

[0145] Of course, multiple cells 71 in each battery module 7 can also be stacked and arranged sequentially along the width direction of the shell body 1, and at least two battery modules 7 can be arranged sequentially along the length direction of the shell body 1.

[0146] As provided in the above embodiment, the shell body 1 is integrally die-cast, with thicker sidewalls and made of metal. It has high structural strength and high thermal conductivity, making it particularly suitable for energy storage devices with a large number of battery cells 71. It can effectively resist damage caused by the kinetic energy, inertial impact, and heat accumulation of the energy storage device during impact.

[0147] Specifically, the cell 71 has a tab 711. When the battery module 7 includes at least two cells 71, the tabs 711 of two adjacent cells 71 bend and extend toward each other, and one tab 711 overlaps and is welded to the other tab 711.

[0148] The tabs 711 of two adjacent cells 71 are connected in series or in parallel, and the battery module 7 finally forms a first electrode terminal 72 and a second electrode terminal 73. The first electrode terminal 72 and the second electrode terminal 73 have opposite polarities. For example, the first electrode terminal 72 is the positive terminal and the second electrode terminal 73 is the negative terminal. Both the first electrode terminal 72 and the second electrode terminal 73 are electrically connected to the BMS component 8, so that the battery module 7 can be charged and discharged.

[0149] By using lap welding, the reliability of the connection between adjacent tabs 711 is improved, and space within the housing 100 is saved.

[0150] Continue to refer to Figure 6 and Figure 9 As shown, in some embodiments, the first electrode terminal 72 and the second electrode terminal 73 are electrically connected to the BMS component 8 via conductive connection bar 74, respectively.

[0151] Specifically, the first electrode terminal 72 is connected to the corresponding terminal connection part on the output base assembly 82 of the BMS component 8 through a conductive connection bar 74. The terminal connection part is electrically connected to the BMS control board 81 through a conductive connector 823, and then connected to the electrical equipment through the first output terminal 821 on the output base assembly 82.

[0152] The second electrode terminal 73 is connected to the corresponding terminal connection part on the output base assembly 82 of the BMS component 8 via another conductive connection bar 74. This terminal connection part is electrically connected to the BMS control board 81 via another conductive connector 823, and then connected to the electrical equipment via the second output terminal 822 on the output base assembly 82.

[0153] In some embodiments, at least one side of the conductive connection bar 74 facing the battery module 7 is provided with an insulating structure 741.

[0154] This ensures that the conductive connector 74 is electrically connected to the corresponding terminal while preventing short circuits caused by contact between the conductive connector 74 and the tab 711.

[0155] In some embodiments, the insulating structure 741 includes a heat-shrinkable insulating sleeve fitted onto the conductive connection bar 74. This arrangement is convenient and improves the insulation protection effect.

[0156] Of course, in other implementations, the insulating structure 741 may also be an insulating coating applied to the conductive connection bar 74 at least on the side facing the battery module 7.

[0157] Continue to combine Figure 6 and Figure 9 As shown, insulating connectors 9 are provided at the positions of the first electrode terminal 72 and the second electrode terminal 73 on the shell body 1.

[0158] The insulating connector 9 provides an installation interface for connecting the conductive connector 74 and the corresponding electrode terminals, facilitating a reliable and convenient connection between the conductive connector 74 and the corresponding electrode terminals, and preventing short circuits caused by contact between the electrode terminals or the conductive connector 74 and the housing body 1.

[0159] For example, the insulating connector 9 can be disposed on the heat insulation component 3, and the insulating connector 9 can be detachably connected to the heat insulation component 3, for example, the two can be engaged by means of a snap-fit ​​protrusion and a snap-fit ​​groove.

[0160] For example, the insulating connector 9 can specifically be a plastic connector.

[0161] This embodiment also provides an electrical device, which may be, but is not limited to, a pure electric vehicle, a hybrid electric vehicle, an electric bicycle, a drone, etc.

[0162] Electrical equipment includes energy storage devices; for example, the electrical equipment is equipped with a storage compartment where the energy storage device is installed.

[0163] The energy storage device in this embodiment has the same structure and implementation principle as the energy storage device provided in the above embodiments, and can bring the same or similar technical effects. It will not be described in detail here, but can be referred to the description of the above embodiments.

[0164] For example, refer to Figure 1 As shown, a slot 18 is provided on the outer wall of the housing 100, and a rotatable hook is provided on the electrical equipment. After the energy storage device is placed into the battery compartment, the hook is rotated to engage with the slot 18, thereby improving the stability of the energy storage device installation.

[0165] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection or an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, the terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0166] In this document, relational terms such as “first” and “second” are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0167] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications or equivalent substitutions made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An energy storage device, characterized in that, It includes the shell body (1), the top cover, the cover plate (2), the battery module (7) and the BMS assembly (8); The shell body (1) includes a bottom wall (11) and a side wall (12) arranged circumferentially along the bottom wall (11). The side wall (12) and the inner wall surface of the bottom wall (11) together form an accommodating space. The top cover is placed on the shell body (1) and seals the accommodating space. The sidewall (12) and the bottom wall (11) are an integral structure, and a heat dissipation channel (10) is formed on the outer wall surface of the sidewall (12) and / or the bottom wall (11); at least part of the cover plate (2) is covered on the outer wall surface of the sidewall (12) and / or the bottom wall (11) and seals the heat dissipation channel (10); The accommodating space is provided with a heat insulation component (3), which divides the accommodating space into at least a first accommodating compartment (13) and a second accommodating compartment (14); The shell body (1) is provided with a cooling medium inlet (15) and a cooling medium outlet (16), and the cooling medium inlet (15) and the cooling medium outlet (16) are respectively connected to the heat dissipation channel (10); the second accommodating chamber (14) is provided on the side of the first accommodating chamber (13) near the cooling medium inlet (15); The battery module (7) is located in the first receiving compartment (13), the BMS component (8) is located in the second receiving compartment (14), and the battery module (7) is electrically connected to the BMS component (8).

2. The energy storage device according to claim 1, characterized in that, A first heat-conducting element (4) is provided on the inner wall of the second accommodating compartment (14) at least at a position corresponding to the heat dissipation channel (10), and the first heat-conducting element (4) is thermally coupled to the BMS component (8).

3. The energy storage device according to claim 2, characterized in that, The first thermally conductive component (4) is a thermally conductive structural adhesive.

4. The energy storage device according to claim 1, characterized in that, The cooling medium inlet (15) is located on the wall of the second receiving chamber (14), and the inner wall of the second receiving chamber (14) protrudes towards the interior of the second receiving chamber (14) to form a first buffer cavity (141). The first buffer cavity (141) is connected to the cooling medium inlet (15) and the heat dissipation channel (10) respectively. And / or, the cooling medium outlet (16) is disposed on the wall of the second receiving chamber (14), and the inner wall of the second receiving chamber (14) protrudes towards the interior of the second receiving chamber (14) to form a second buffer cavity (142), the second buffer cavity (142) being connected to the heat dissipation channel (10) and the cooling medium outlet (16) respectively.

5. The energy storage device according to any one of claims 1 to 4, characterized in that, At least a portion of the heat dissipation channel (10) is disposed on the outer wall surface of the bottom wall (11); The cooling medium inlet (15) and the cooling medium outlet (16) are located on the side wall (12).

6. The energy storage device according to claim 5, characterized in that, The cooling medium inlet (15) and the cooling medium outlet (16) are located on the same side of the shell body (1); In the width direction along the sidewall (12) where the cooling medium inlet (15) and the cooling medium outlet (16) are located, the distance between the cooling medium inlet (15) and the cooling medium outlet (16) is not less than 1 / 3 of the width of the sidewall (12).

7. The energy storage device according to any one of claims 1 to 4, characterized in that, The heat insulation component (3) includes two oppositely arranged plates (31), and a heat insulation cavity (30) is formed between the two plates (31); At least one connecting plate (32) is connected between the two plates (31), and the connecting plate (32) divides the heat insulation cavity (30) into at least two sub-cavities; And / or, there are at least two heat insulation elements (3), one of which is located between the battery module (7) and the BMS assembly (8), and the other of which is located at the end of the battery module (7) away from the second receiving compartment (14); And / or, the heat insulation element (3), the side wall (12) and the bottom wall (11) are an integral structure.

8. The energy storage device according to any one of claims 1 to 4, characterized in that, The second receiving compartment (14) has a mounting frame (5); The BMS component (8) is mounted on the mounting bracket (5) and is thermally coupled to the mounting bracket (5); the mounting bracket (5) is thermally coupled to the side wall (12) and / or the bottom wall (11) on which the heat dissipation channel (10) is provided.

9. The energy storage device according to claim 8, characterized in that, A first heat-conducting element (4) is provided between the mounting bracket (5) and the side wall (12) and / or bottom wall (11) on which the heat dissipation channel (10) is provided; And / or, a second heat-conducting element (6) is provided between the BMS component (8) and the mounting bracket (5); And / or, the mounting bracket (5) has a flange (53) that overlaps on and is connected to the heat insulation member (3); And / or, the BMS component (8) includes a BMS control board (81) and an output base assembly (82) connected to the BMS control board, the BMS control board (81) being connected to and thermally coupled to the mounting bracket (5), the mounting bracket (5) having a support step (54), and the output base assembly (82) being located on the support step (54); And / or, the mounting bracket (5) is an aluminum mounting bracket.

10. The energy storage device according to claim 8, characterized in that, The mounting bracket (5) includes a main body plate (51) and a side panel (52) connected to one side of the main body plate (51). The main body plate (51) and the side panel (52) form an accommodating space, and the BMS component (8) is located within the accommodating space. The BMS component (8) is mounted on the main body plate (51) and is thermally coupled to the main body plate (51). At least a portion of the side panel (52) is thermally coupled to the bottom wall (11) and / or side wall (12) provided with the heat dissipation channel (10).

11. The energy storage device according to any one of claims 1 to 4, characterized in that, A third heat-conducting element (131) is provided on the inner wall of the first accommodating compartment (13) at least at the position corresponding to the heat dissipation channel (10), and the third heat-conducting element (131) is thermally coupled to the battery module (7); And / or, the shell body (1) is an aluminum shell.

12. The energy storage device according to any one of claims 1 to 4, characterized in that, The battery module comprises at least two units; And / or, the battery module (7) includes at least two cells (71), each cell (71) having a tab (711); the tabs (711) of two adjacent cells (71) bend and extend toward each other, and the tab (711) of one cell (71) overlaps and is welded to the tab (711) of the other cell (71); And / or, the battery module (7) has a first electrode terminal (72) and a second electrode terminal (73), the first electrode terminal (72) and the second electrode terminal (73) having opposite polarities, the first electrode terminal (72) and the second electrode terminal (73) being electrically connected to the BMS assembly (8) via conductive connection bars (74); the conductive connection bars (74) have an insulating structure (741) on at least one side facing the battery module (7); The insulation structure (741) includes a heat-shrinkable insulating sleeve fitted onto the conductive connection bar (74).

13. An electrical appliance, characterized in that, Includes the energy storage device as described in any one of claims 1 to 12.

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